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Related Questions:

Fuel Pump Flow Control Module (FPCM) - LMF
The fuel pump flow control module (FPCM) is a serviceable GMLAN module. The FPCM receives the desired fuel pressure message from the engine control module (ECM) and controls the fuel pump located within the fuel tank to achieve the desired fuel pressure. The FPCM sends a 25 KHZ PWM signal to the fuel pump, and pump speed is changed by varying the duty cycle of this signal. Maximum current supplied to the fuel pump is 15 amps. A liquid fuel pressure sensor provides fuel pressure feedback to the FPCM.
Electronic Returnless Fuel System (ERFS) - LMF
The electronic returnless fuel system is a microprocessor controlled fuel delivery system which transports fuel from the tank to the fuel rails. It functions as an electronic replacement for a traditional, mechanical fuel pressure regulator. A pressure vent valve within the fuel tank provides an added measure of fuel pump flow control module (FPCM). Desired fuel pressure is commanded by the engine control module (ECM), and transmitted to the FPCM via a GMLAN serial data message. A liquid fuel pressure sensor provides the feedback the FPCM requires for Closed Loop fuel pressure control.

It could be fuel pump or fuel pump relay.Click here to see how to remove fuel pump.Click here to see fuel pump.See how much the fuel pump is,make sure it's that.Here's the fuel pump relay.Here's how to remove fuel pressure.

Apply a light coat of Premium Long-Life Grease XG-1-C, -K or equivalent meeting Ford specification ESA-M1C75-B on a new O-ring seal to hold it in place and install it into the O-ring seal groove on the fuel tank.

Install fuel pump module carefully to ensure that filter is not damaged. Make sure that locating keys are in keyways and O-ring seal remains in place.

Remove or disconnect the following:
NOTE
When the fuel sending unit needs to be removed, pull the tab
upwards. The tab is located on the sending unit, opposite the end of the
float. After the tab is pulled, the sending unit will lift straight out
of the tank bracket.
Negative battery cable
Rear seat and the access cover
Fuel pump electrical connector
Fuel lines from the fuel pump assembly
Locking ring
Fuel gauge assembly
Fuel tube and connector from the fuel gauge
Fuel pump by pinching the 2 locking tabs together. Lift the fuel
pump assembly straight upward and out of fuel tank.
O-ring and discard

Place a clean rag in the hole to keep out dirt.

To install:

Remove the rag

Install or connect the following:
NOTE
Verify that the mark on the fuel tank and the components are
aligned when installing the pump and fuel gauge sending unit.
New O-ring and fuel pump
Electrical connection and fuel tube to the fuel gauge sending unit
Fuel sending unit into the tank

If equipped with a threaded lock ring torque the ring to 22-26 ft.
lbs. (30-35 Nm). If equipped with a lock ring held by six retaining
screws, torque the screws to 18-22 inch lbs. (2-2.5 Nm).
Fuel lines and fuel pump electrical connector. Always install new
clamps on the fuel lines.
Negative battery cable

The fuel pump is located in the fuel tank on all vehicles.
In-tank fuel pumps are accessible by lifting up the rear seat to gain
access to the inspection cover.

Before servicing the vehicle, refer to the Precautions Section.

Relieve the fuel system pressure.

Remove or disconnect the following:
Negative battery cable
Rear seat from the vehicle
Inspection cover that is located under the rear seat
Inlet and outlet fuel lines from the fuel pump assembly
Fuel pump and gauge wiring connections
6 mounting bolts that secure the fuel pump assembly to the top of
the fuel tank

Raise up the fuel pump assembly and detach the fuel tubes and
connector.
Fuel gauge assembly
Fuel pump with the fuel chamber

Pull up the front of the fuel pump chamber and slide the chamber
forward.
Fuel pump from the chamber
O-ring seal or gasket

To install:

Install or connect the following:
Fuel pump to the fuel pump chamber and slide chamber rearward
Fuel pump with the fuel pump chamber
Fuel gauge assembly using a new O-ring
Fuel tubes and connector. Use new hoses and clamps.
6 mounting bolts to the top of the fuel gauge unit and torque the
bolts to 18-22 inch lbs. (2-2.5 Nm)
Fuel pump and gauge wiring connections
New inlet and outlet fuel lines to the fuel pump assembly
Negative battery cable

Start the vehicle, check for leaks and repair if necessary.Inspection cover and the rear seat

Fig. 1: View of the fuel pump assembly and related components
The fuel pump is mounted to the fuel sender assembly inside the fuel
tank. The fuel is pumped to the engine at a specified flow and pressure
by the fuel pump. Excess fuel is returned to the fuel tank by the return
pipe. The fuel pump delivers a constant flow of fuel to the engine even
during low fuel conditions and aggressive vehicle maneuvers.

CAUTION
When working on or near the fuel tank, be sure to observe the
information molded on the bottom of the tank.Removal & Installation

Disconnect the negative battery cable.

Properly relieve the fuel system pressure.

(see Figure 2)

Fig. 2: Exploded view of the fuel pump-to-tank mounting
components

Drain and remove the fuel tank.

Remove the fuel sender assembly.

Disassemble the fuel pump strainer and the fuel pump: Note the
position of the strainer in relation to the pump.